We should never underestimate the ability for military personnel to find further uses for their issued kit. The ingenuity of a grunt/squaddie is only matched by their ability to break something, or get it pregnant.
Thanks for the video. I’ve like this design of rifle for many years. I’ve never had a problem adjusting safety tension with just my hand until a handled a Polish copy. Whatever steel they used is very stout.
I've had my ak rifles for 20 years, never cleaned them. Just lightly sprayed oil on the moving parts and wiped the outside with a oiled rag wear I handled it. Zero malfunctions in all those years.
I have seen that online somewhere as well, but you can use anything really to get leverage. I did not see that listed in the original training manual though.
Generally you use it as an aid in the disassembly and reassembly of the trigger, disconnector, and disconnector spring. You can punch them out, or use it to hold these in place within the receiver as you pin them back into place.